Air cylinder with good sealing performance

Abstract

The utility model relates to an air cylinder with good sealing performance, which belongs to the technical field of activated carbon desulfurization and denitrification equipment, and comprises a cylinder body, an end cover, a push-pull rod and a sealing element, an accommodating cavity is defined in the cylinder body, the cylinder body is at least provided with an opening communicated with the accommodating cavity, and the opening is arranged at one end of the cylinder body in the length direction; the end cover is arranged at the opening of the accommodating cavity and is used for blocking the accommodating cavity; the end cover is provided with a protruding part, the protruding part protrudes out of the side, facing the cylinder body, of the end cover, and the protruding part extends into the containing cavity. A groove is further formed in the side, facing the cylinder body, of the end cover, located in the periphery of the protruding part and extends in the circumferential direction of the protruding part. The push-pull rod stretches out and draws back in the length direction of the cylinder body, one end of the push-pull rod is arranged in the cylinder body, and the other end of the push-pull rod penetrates through the end cover and extends out of the cylinder body. The sealing piece is embedded into the groove and makes contact with the end, provided with the opening, of the cylinder body, so that the sealing piece is prevented from sliding out due to frequent push-pull actions of the push-pull rod, and the sealing performance of the air cylinder is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of activated carbon desulfurization and denitrification equipment, and in particular relates to a cylinder with good sealing performance. Background Technology

[0002] With the rapid development of industrialization, the flue gas emitted by coal-fired power plants, steel, chemical, cement and other industries contains high concentrations of sulfur oxides and nitrogen oxides. Desulfurization and denitrification devices can effectively treat sulfur oxides and nitrogen oxides in the waste gas, reduce their emissions, and thus alleviate environmental pollution.

[0003] As a key piece of equipment for controlling material feeding in desulfurization and denitrification devices, cylinders need to operate stably for a long time. However, in actual operation, leakage may occur between the cylinder end cap and the cylinder body, which will affect the normal operation of the push-pull rod and have a significant impact on the long-term stable operation of the desulfurization and denitrification device, posing a major hidden danger.

[0004] Therefore, designing a cylinder with good sealing performance for flue gas desulfurization and denitrification is of great significance. Utility Model Content

[0005] To address the shortcomings of related technologies, this utility model provides a cylinder with good sealing performance. By setting a groove on the side of the cylinder end cap facing the cylinder body and embedding the seal in the groove, the seal is prevented from slipping out due to the frequent pushing and pulling action of the push-pull rod, thus ensuring the sealing performance of the cylinder.

[0006] This utility model provides a cylinder with good sealing performance, comprising:

[0007] The cylinder body has an internal cavity that is defined and has at least one opening that communicates with the cavity. The opening is located at one end of the cylinder body along its length.

[0008] An end cap is provided at the opening of the receiving cavity to seal the receiving cavity; the end cap has a protrusion that protrudes from the side of the end cap facing the cylinder body and extends into the receiving cavity; the side of the end cap facing the cylinder body also has a groove that is located on the outer periphery of the protrusion and extends circumferentially along the protrusion.

[0009] Push-pull rod, which extends and retracts along the length of the cylinder body. One end of the push-pull rod is located inside the cylinder body, and the other end of the push-pull rod extends out of the cylinder body through the end cover.

[0010] The seal is embedded in the groove and contacts the end of the cylinder body with an opening. The seal is used to seal the mating gap between the end cap and the cylinder body.

[0011] This technical solution provides a protrusion on the side of the end cap facing the cylinder body, which extends into the receiving cavity to better connect the cylinder body and the end cap. A groove is provided on the side of the end cap facing the cylinder body, extending circumferentially around the protrusion. This groove embeds the seal within the groove, preventing it from slipping out due to frequent pushing and pulling of the push-pull rod, thus avoiding gas leakage caused by gaps between the end cap and the cylinder body and affecting the cylinder's sealing performance.

[0012] In some embodiments, the inner diameter of the groove wall on the side of the groove closest to the protrusion is less than or equal to the inner diameter of the cylinder body; the inner diameter of the groove wall on the side of the groove furthest from the protrusion is less than or equal to the outer diameter of the cylinder body.

[0013] This technical solution sets the inner diameter of the groove wall on the side of the groove closest to the protrusion to be less than or equal to the inner diameter of the cylinder body, and the inner diameter of the groove wall on the side of the groove furthest from the protrusion to be less than or equal to the outer diameter of the cylinder body. This allows the cylinder body to compress the seal in the groove, preventing the seal from slipping out due to the frequent pushing and pulling action of the push-pull rod, which would cause gas leakage due to the gap between the end cover and the cylinder body, thus affecting the sealing performance of the cylinder.

[0014] In some embodiments, the inner diameter of the groove wall on the side of the groove away from the protrusion is greater than or equal to the outer diameter of the protrusion.

[0015] This technical solution sets the inner diameter of the groove wall on the side away from the protrusion to be greater than or equal to the outer diameter of the protrusion, so that the seal can be embedded in the groove to seal the mating gap between the cylinder body and the end cover. It also allows the cylinder body to squeeze the seal in the groove, preventing the seal from slipping out due to the frequent pushing and pulling action of the push-pull rod, which would cause gas leakage due to the mating gap between the end cover and the cylinder body and affect the sealing performance of the cylinder.

[0016] In some embodiments, the width of the seal is greater than or equal to the width of the groove, and the thickness of the seal is greater than or equal to the thickness of the groove.

[0017] This technical solution sets the width of the seal to be greater than or equal to the width of the groove, and the thickness of the seal to be greater than or equal to the thickness of the groove, so that the seal can completely fill the groove and be tightly embedded in the groove, preventing the seal from slipping out of the groove.

[0018] In some embodiments, the groove is recessed 2 mm from the side of the end cap facing the cylinder body, and the width of the groove is 5 mm.

[0019] In some embodiments, the inner diameter of the groove wall on the side of the groove closest to the protrusion is 197 mm, and the inner diameter of the groove wall on the side of the groove furthest from the protrusion is 207 mm.

[0020] In some embodiments, the end cap has a square structure, the protrusion has a cylindrical structure, and the groove has an annular structure.

[0021] This technical solution sets the end cap to a square structure and the protrusion to a cylindrical structure. When connecting the end cap and the cylinder, there is no need to strictly adjust the orientation, and the cylindrical protrusion allows the end cap to be adjusted and rotated, so that the end cap and the cylinder can fit together better.

[0022] In some embodiments, the accommodating cavity is a through cavity arranged along the length of the cylinder; two end caps are provided, which are correspondingly arranged at both ends of the cylinder, and the push-pull rod passes through one of the end caps.

[0023] In some embodiments, the cylinder with good sealing performance also includes connecting rods, which are located outside the accommodating cavity, and the two ends of the connecting rods in the length direction are connected to the two end caps respectively; four connecting rods are provided, and the four connecting rods are provided at the four corners of the end caps respectively.

[0024] This technical solution involves setting a connecting rod outside the accommodating cavity, with both ends of the connecting rod connected to the two end caps along its length, thereby connecting the two end caps. The connecting rod is positioned at four corners of the end caps to increase the strength of the connection between the two end caps.

[0025] In some embodiments, the end cap through which the push-pull rod passes has a support portion on the side away from the cylinder body, the support portion protruding from the side of the end cap away from the cylinder body, and the push-pull rod passing through the support portion.

[0026] This technical solution increases the contact area between the push-pull rod and the end cap through which the push-pull rod passes by by setting a support part on the side of the end cap away from the cylinder body, with the support part protruding from the side of the end cap away from the cylinder body.

[0027] Based on the above technical solution, the cylinder with good sealing performance in this embodiment of the utility model has a groove on the end cover, and the groove extends circumferentially along the protrusion to embed the seal in the groove, preventing the seal from slipping out due to the frequent pushing and pulling action of the push-pull rod. Furthermore, by setting the relationship between the inner diameter of the groove wall on the side of the groove near the protrusion and the inner diameter of the cylinder body, as well as the relationship between the inner diameter of the groove wall on the side of the groove away from the protrusion and the outer diameter of the cylinder body, the cylinder body can tightly squeeze the seal in the groove, further preventing the seal from slipping out and affecting the sealing performance of the cylinder. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 A schematic diagram of the structure of a cylinder with good sealing performance provided in an embodiment of this utility model;

[0030] Figure 2 Schematic diagram of the structure of the first end cover of the cylinder with good sealing performance provided in the embodiment of this utility model Figure 1 ;

[0031] Figure 3 Schematic diagram of the structure of the first end cover of the cylinder with good sealing performance provided in the embodiment of this utility model Figure 2 ;

[0032] Figure 4 for Figure 3 Sectional view of AA;

[0033] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0034] Figure 6 Schematic diagram of the structure of the second end cover of the cylinder with good sealing performance provided in the embodiment of this utility model Figure 1 ;

[0035] Figure 7 Schematic diagram of the structure of the second end cover of the cylinder with good sealing performance provided in the embodiment of this utility model Figure 2 ;

[0036] Figure 8 Schematic diagram of the structure of the second end cover of the cylinder with good sealing performance provided in the embodiment of this utility model Figure 3 ;

[0037] Figure 9 for Figure 8 Sectional view of BB;

[0038] Figure 10 for Figure 9 Enlarged view of section B in the middle.

[0039] In the picture:

[0040] 1. Cylinder body; 2. End cap; 3. Push-pull rod; 4. Seal; 5. Connecting rod;

[0041] 21. First end cap; 22. Second end cap; 23. Protrusion; 24. Groove; 25. Connecting hole;

[0042] 26. Vent;

[0043] 221. Support section. Detailed Implementation

[0044] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the activated coke desorption tower feeding system of the desulfurization and denitrification unit, the cylinder controlling the activated coke feeding ensures the sealing performance of the cylinder by setting a seal 4 between the end cover 2 and the cylinder body 1. However, due to the frequent start and stop operation of the push-pull rod 3, the seal 4 between the end cover 2 and the cylinder body 1 often slips out, resulting in poor cylinder sealing, which affects the normal operation of the push-pull rod 3.

[0047] The original cylinder had the seal 4 located at the connection between the cylinder body 1 and the end cover 2. One end of the seal 4 was in close contact with the cylinder body 1, and the other end of the seal 4 was in close contact with the end cover 2. The contact surface between the seal 4 and the cylinder body 1 was flat. The wall thickness of the cylinder body 1 and the width of the seal 4 were small, which made the sealing contact area between the cylinder body 1 and the seal 4 narrow. When the cylinder was operating, the frequent operation of the push-pull rod 3 caused the air pressure inside the cylinder body 1 to change frequently, which caused the seal 4 between the end cover 2 and the cylinder body 1 to slide out.

[0048] Based on this, embodiments of this application provide a cylinder with good sealing performance, such as... Figures 1-10As shown, the cylinder with good sealing performance includes a cylinder body 1, an end cap 2, a push-pull rod 3, and a seal 4. The cylinder body 1 has a cavity defined inside, and the cylinder body 1 has at least one opening communicating with the cavity, which is located at one end along the length of the cylinder body 1. The end cap 2 is located at the opening of the cavity and is used to seal the cavity. The end cap 2 has a protrusion 23, which protrudes from the side of the end cap 2 facing the cylinder body 1 and extends into the cavity. The side of the end cap 2 facing the cylinder body 1 also has a groove 24, which is located on the outer periphery of the protrusion 23 and extends circumferentially along the protrusion 23. The push-pull rod 3 extends and retracts along the length of the cylinder body 1, with one end of the push-pull rod 3 located inside the cylinder body 1 and the other end of the push-pull rod 3 extending out of the cylinder body 1 through the end cap 2. The seal 4 is embedded in the groove 24 and contacts the end of the cylinder body 1 with the opening, so that the cylinder body 1 squeezes the seal 4 in the groove 24.

[0049] It should be noted that the seal 4 is used to seal the mating gap between the end cover 2 and the cylinder body 1.

[0050] It should also be noted that the push-pull rod 3 is set through the protrusion 23.

[0051] The cylinder with good sealing performance is sealed by setting a groove 24 in the end cover 2 and embedding the seal 4 into the groove 24 to seal the fit gap between the end cover 2 and the cylinder body 1, thereby preventing the seal 4 from slipping out due to the frequent pushing and pulling action of the push rod 3 and increasing the sealing performance of the cylinder.

[0052] It should be noted that the inner diameter of the groove wall on the side of the groove 24 closest to the protrusion 23 is less than or equal to the inner diameter of the cylinder 1; the inner diameter of the groove wall on the side of the groove 24 furthest from the protrusion 23 is less than or equal to the outer diameter of the cylinder 1, so that the cylinder 1 can fully contact the seal 4, allowing the cylinder 1 to better compress the seal 4 and increase the sealing effect of the seal.

[0053] It should also be noted that the inner diameter of the groove wall on the side of the groove 24 away from the protrusion 23 is greater than or equal to the outer diameter of the protrusion 23, so that the seal 4 can be embedded in the groove 24 to seal the fitting gap between the cylinder body 1 and the end cover 2, and the cylinder body 1 can squeeze the seal 4 in the groove 24.

[0054] In some embodiments, the outer diameter of the protrusion 23 is 197 mm.

[0055] It should be noted that the width of the seal 4 is greater than or equal to the width of the groove 24, and the thickness of the seal 4 is greater than or equal to the thickness of the groove 24, so that the seal 4 can completely fill the groove 24 and prevent the seal 4 from sliding out of the groove 24.

[0056] In some embodiments, the groove 24 has a thickness of 2 mm and a width of 5 mm.

[0057] In other embodiments, the inner diameter of the groove wall on the side of the groove 24 closest to the protrusion 23 is 197 mm, and the inner diameter of the groove wall on the side of the groove 24 furthest from the protrusion 23 is 207 mm.

[0058] like Figures 1-2 and Figures 6-7 As shown, the end cap 2 is provided with a vent 26, which is connected to the accommodating cavity. Compressed gas is introduced into the cylinder 1 through the vent 26 or the compressed gas in the cylinder 1 is discharged through the vent 26.

[0059] In some embodiments, the vent 26 is located circumferentially on the end cap 2.

[0060] The protrusion 23 has a cylindrical structure and the groove 24 has an annular structure, so that the orientation does not need to be strictly adjusted when connecting the end cover 2 and the cylinder 1. The cylindrical protrusion 23 allows the end cover 2 to adjust its rotation position, so that the end cover 2 and the cylinder 1 can fit together better.

[0061] like Figure 1 As shown, there are two end caps 2, which are respectively set at both ends of the cylinder body 1. The push-pull rod 3 passes through one of the end caps 2. The two end caps 2 are connected by a connecting rod 5. The connecting rod 5 is located outside the accommodating cavity, and the two ends of the connecting rod 5 in the length direction are respectively connected to the two end caps 2.

[0062] In some embodiments, the end cap 2 has a square structure, and four connecting rods 5 are provided, which are connected to the four corners of the end cap 2 respectively.

[0063] The end cap 2 is provided with a connecting hole 25, and the connecting rod 5 is set through the connecting hole 25 so that the connecting rod 5 is connected to the end cap 2.

[0064] One end of the connecting rod 5 is provided with a stop part, which contacts the side of one of the end caps 2 away from the cylinder body 1. One end of the connecting rod 5 passes through the connecting holes 25 of the two end caps 2 in sequence. The end of the connecting rod 5 without the stop part is connected with a fastener so that the connecting rod 5 connects the two end caps 2 to each other.

[0065] When there are four connecting rods 5, there are also four connecting holes 25, which are located at the four corners of the end cap 2.

[0066] In some embodiments, the connecting rod 5 is provided with external threads, and the fastener is a nut, which is connected to the connecting rod 5 by threads.

[0067] For ease of description, the two end caps 2 are respectively the first end cap 21 and the second end cap 22, wherein the push-pull rod 3 is set through the second end cap 22.

[0068] It should be noted that in some embodiments, the side of the first end cap 21 facing away from the cylinder body is in contact with the abutment.

[0069] like Figure 4 As shown, on the first end cap 21, the inner diameter length of the protrusion 23 is set to a first distance d1, and the inner diameter length of the first end cap 21 is set to a second distance d2, and the first distance d1 of the inner diameter length of the protrusion 23 is less than the second distance d2 of the inner diameter length of the first end cap 21.

[0070] like Figure 9 As shown, on the second end cap 22, the inner diameter length of the protrusion 23 is set to a third distance d3, and the inner diameter length of the second end cap 22 is set to a fourth distance d4. The third distance d3 of the inner diameter length of the protrusion 23 of the second end cap 22 is less than the fourth distance d4 of the inner diameter length of the second end cap 22.

[0071] It should be noted that in some embodiments, the first distance d1 is equal to the third distance d3, and the second distance d2 is equal to the fourth distance d4.

[0072] In some embodiments, such as Figure 6 and Figure 7 As shown, the second end cap 22 is provided with a support portion 221 on the side away from the cylinder body 1. The support portion 221 protrudes from the side of the second end cap 22 away from the cylinder body 1 and is provided with a through hole so that the push-pull rod 3 can pass through the through hole and extend out of the support portion 221, thereby increasing the contact area between the push-pull rod 3 and the second end cap 22.

[0073] The installation steps for the cylinder with good sealing performance are as follows: First, install the sealing element 4 in the grooves 24 of the first end cover 21 and the second end cover 22 respectively; align the protrusion 23 of the first end cover 21 with the opening at one end of the cylinder body 1's receiving cavity, and slowly insert it so that the protrusion 23 extends into the receiving cavity, while ensuring that the sealing element 4 is in close contact with the opening at one end of the cylinder body 1; next, pass one end of the push-pull rod 3 through the second end cover 22, and slowly insert it into the receiving cavity from the opening at the other end of the receiving cavity, and then align the protrusion 23 of the second end cover 22 with the cylinder body 1's receiving cavity. Slowly insert the cylinder body 1 into the opening at the other end of the cavity, allowing the protrusion 23 to extend into the cavity, while ensuring that the seal 4 is in close contact with the opening at the other end of the cylinder body 1; then, pass the connecting rod 5 through the connecting hole 25 of the second end cover 22 along the length of the cavity from the connecting hole 25 of the first end cover 21, and install a stop at one end of the connecting rod 5 so that the stop contacts the side of the first end cover 21 away from the cylinder body 1. Connect the other end of the connecting rod 5 with a fastener so that the connecting rod 5 connects the two end covers 2 to each other.

[0074] The aforementioned cylinder with good sealing performance is designed with a groove 24, and the seal 4 is embedded in the groove 24. The width and depth of the groove 24 are set to be consistent with the depth and width of the seal 4, so that the seal 4 is completely embedded in the groove 24. When compressed air is introduced into or discharged from the cylinder body 1, the seal 4 of the first end cover 21 and the seal 4 of the second end cover 22 will not slip out due to the frequent extension and retraction of the push-pull rod 3, thereby affecting the sealing performance of the cylinder.

[0075] The aforementioned cylinder with good sealing performance ensures the reliability and long-term stable operation of the push-pull rod 3 under frequent start-stop conditions, effectively guaranteeing the continuity and stability of activated coke feeding in the desorption tower, thereby maintaining the environmental treatment efficiency of the entire desulfurization and denitrification system.

[0076] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cylinder with good sealing performance, characterized in that, include: A cylinder body, wherein an accommodating cavity is defined inside the cylinder body, and the cylinder body has at least one opening communicating with the accommodating cavity, the opening being located at one end of the cylinder body along its length. An end cap is provided at the opening of the accommodating cavity to seal the accommodating cavity; the end cap has a protrusion that protrudes from the side of the end cap facing the cylinder body and extends into the accommodating cavity; the side of the end cap facing the cylinder body also has a groove that is located on the outer periphery of the protrusion and extends circumferentially along the protrusion. A push-pull rod extends and retracts along the length of the cylinder body, with one end of the push-pull rod located inside the cylinder body and the other end of the push-pull rod extending out of the cylinder body through the end cap; A sealing element is embedded in the groove and is in contact with the end of the cylinder body that has the opening. The sealing element is used to seal the mating gap between the end cap and the cylinder body.

2. The cylinder with good sealing performance according to claim 1, characterized in that, The inner diameter of the groove wall on the side closer to the protrusion is less than or equal to the inner diameter of the cylinder body; the inner diameter of the groove wall on the side farther from the protrusion is less than or equal to the outer diameter of the cylinder body.

3. The cylinder with good sealing performance according to claim 1, characterized in that, The inner diameter of the groove wall on the side away from the protrusion is greater than or equal to the outer diameter of the protrusion.

4. The cylinder with good sealing performance according to claim 1, characterized in that, The width of the seal is greater than or equal to the width of the groove, and the thickness of the seal is greater than or equal to the thickness of the groove.

5. The cylinder with good sealing performance according to claim 1, characterized in that, The groove is recessed 2mm from the side of the end cap facing the cylinder body, and the width of the groove is 5mm.

6. The cylinder with good sealing performance according to claim 1, characterized in that, The inner diameter of the groove wall on the side closer to the protrusion is 197mm, and the inner diameter of the groove wall on the side farther from the protrusion is 207mm.

7. The cylinder with good sealing performance according to claim 1, characterized in that, The end cap has a square structure, the protrusion has a cylindrical structure, and the groove has a ring structure.

8. The cylinder with good sealing performance according to claim 1, characterized in that, The accommodating cavity is a through cavity arranged along the length of the cylinder body; two end caps are provided, and the two end caps are respectively arranged at both ends of the cylinder body, and the push-pull rod passes through one of the end caps.

9. The cylinder with good sealing performance according to claim 8, characterized in that, It also includes connecting rods, which are located outside the accommodating cavity, and the two ends of the connecting rods along their length are connected to the two end caps respectively; there are four connecting rods, which are set at the four corners of the end caps respectively.

10. The cylinder with good sealing performance according to claim 1, characterized in that, The end cap through which the push-pull rod passes has a support portion on the side away from the cylinder body. The support portion protrudes from the side of the end cap away from the cylinder body, and the push-pull rod passes through the support portion.

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